September 5, 2023September 5, 2023OSPF, Routing and Switching

OSPF Basic Configuration Deep Dive – Part 1

Building OSPF Adjacencies Down This is the first OSPF neighbor state. It means that no information (hellos) has been received […]

September 5, 2023September 15, 2023OSPF

OSPF Notes Basics – Part 2

Part 1 Link State Advertisements (LSAs) OSPF Header The major fields of the OSPF packet header are as follows: Identifying […]

September 4, 2023September 7, 2023OSPF, Routing and Switching

OSPF Notes Basics – Part 1

Part 2 Forming OSPF Adjacencies Must match items: Must be unique items: OSPF Network Types Broadcast DR/BDR Election There is […]

September 3, 2023September 8, 2023DMVPN PHASE1, IP, Routing and Switching

DMVPN Notes – Phase 1 Static Mappings

EVE-NG topology DMVPN combines mGRE, the Next-Hop Resolution Protocol (NHRP), and optional IPSec. DMVPN can be implemented as Phase 1, […]

September 2, 2023September 2, 2023Routing and Switching, Subnetting

VLSM – Review – Example

VLSM table Major Network = 10.15.0.0/22 11111111.11111111.11111100.00000000 Number of networks = 2^ 6 = 64 Network Address Usable Host Range […]

August 31, 2023August 31, 2023OSI Model, Routing and Switching

OSI Model High-Level Review

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a communication system or network […]

August 31, 2023August 31, 2023TCP

TCP Basics Part 1

TCP Header

August 30, 2023August 30, 2023DHCP, Routing and Switching

DHCP

DHCP stands for Dynamic Host Configuration Protocol. It’s a network protocol used to automatically assign IP addresses and other network […]

August 30, 2023August 30, 2023Routing and Switching, Traceroute

Traceroute

Traceroute from PC1 (192.168.13.2) to PC2 (192.168.62.2) Note to self: The process repeats for each router in the path. Even […]

August 26, 2023August 26, 2023VTP

R&S Study Labs – VTP

VTP Modes You can configure a switch to operate in any one of these VTP modes: VTP Version 1 VTP […]